The mark reads (from right to left, top row to bottom):
Jiangxi, Jingdezhen, Min Ci (reputable porcelain) with the #1 being the factory.
Stamp mark dates to the 1960s before Cultural Revolution.
Nov 02, 2011
Mark by: Tim
Can you provide a close up of the mark? It is upside down, BTW. The mark says Jiangxi (a province), Jingdezhen (the city of porcelain manufacture) and something below I cannot make out. This stamp dates to the 1960s before the Cultural Revolution and is no longer in use.
Nov 01, 2011
ginger jar by: peter
This could be vintage. About the middle of the 20th century, probably.